In the present study CMC values of a non-ionic surfactant, Triton X-100, were taken inwater, water + propan-2-ol and water + fructose systems at different concentrations. From CMC values micellisationconstant (),Setchenov constant, () and interaction parameters ‘P’ and ‘q’ were calculated. values are positive for propan-2- ol+water system and negative for fructose +water system.value in propan-2-ol system are more as compared to fructose system. It suggests that nature of polar group of additive plays major role in solubilisation process. The high ‘P’ and ‘q’ values in presence of propan-2-ol suggest that propan-2-ol penetrates in the interior of micelle.
